Are loud children a protect class?

[Josh Dillingham]

I showed a 3 bedroom apartment today to a couple with 4 children. During the showing the kids were slamming doors and stomping around loudly. The number of kids is not an issue ( and I obviously can't deny them because they have 4 kids) I have two other apartments in the building with families that have 3 or 4 kids, and prefer to rent to families as opposed to roomates, but these kids seemed abnormally loud and potentially destructive without much correction from the parents. This is a second floor apartment and I'm concerned this would be a nightmare for my downstairs tenants. Would denying them because their kids are loud be seen as the same as denying them for having 4 kids, which is illegal?